Newborn photographer Cassandra English documented their introduction to the world in what she says was a "career-defining shoot".

"I've been documenting the family the whole way, from neonatal intensive care unit (NICU) through to now. I've always been in contact with them, making sure it all went," she told Newshub.

"It's just amazing they are alive and well and chubby."

Ms English has photographed many babies in her career, including two sets of triplets and three sets of twins.

Photo credit: Cassandra English of Hazel and Cass

But she has never had the opportunity to photograph quadruplets, a rare opportunity in any newborn photographers career, she says.

"It was definitely a career-defining shoot... it was an honour to photograph them really.

"I've been dreaming up this session since I found out about Kendall carrying these four tiny miracles.I'm still pinching myself, I feel completely honoured to have been entrusted to capture the new life of New Zealand's newest loves," Ms English says.

The three girls and one boy are probably the only quadruplets she will meet in her career, she says.

"It's a family of seven, that is pretty amazing, it's one big house of love."

Ms English needed four assistants, three baby shushers, 27 bunches of fresh flowers, a handmade wreath and a wooden bed to bring the pictures to life.

During the 7.5 hour shoot, there were 13 nappy changes, nine bottles and Ms English was only vomited on twice, which was "totally worth it".